Well, his demeanour seems much improved today
He's done a mix of small black poohs and normal poohs overnight and he ate another 10g of pellets and drank some water on his own. I'm going to leave him alone for most of the day to get some rest (the poor thing has been pulled and poked for the last few days) and then wake him up to check on him this afternoon. He seemed to be quite good when I checked on him this morning though. I think getting him to the vet as soon as I could and being proactive with the critical care and lifeline was the trick. I won't be happy until he's been well a few days and even then, I reckon I'll be on edge with him for awhile but so happy he's improving